@techreport{oai:ouc.repo.nii.ac.jp:00001524,
 author = {下山, 晃 and SHIMOYAMA, Akira},
 month = {May},
 note = {20268783, 大阪商業大学, 20520561},
 title = {幕末開港期の欧米毛皮会社資料の調査：エコシステムと海獣毛皮猟},
 year = {2011},
 yomi = {シモヤマ, アキラ}
}